Bottom-loading lever balance capable of preventing balance upright from bending

Abstract

The invention provides a bottom-loading lever balance capable of preventing a balance upright from bending. In the lever balance, the balance upright is fixed in the center above a fixed platform; the upper end of the balance upright is provided with a balance crossbeam; two ends of the balance crossbeam are provided with balance scales; two switch uprights for supporting two ends of the balance crossbeam are fixed on a switch platform; the switch platform is fixed on an inverted triangular lift support; the bottom end of the lift support is connected with a lift platform; and a rotatable cam is connected with the lift platform. The lever balance also comprises a plurality of bias load stress supports which are arranged on the periphery of the balance upright and are fixed above the fixed platform, wherein a bias load stress platform is fixed above the bias load stress supports; two sides of the lift upright are fixed above the lift platform through the bias load stress platform and the fixed platform; and a plurality of lift shafts capable of lifting up and down are arranged between the bias load stress platform and the switch platform. The lever balance in the invention can ensure that the balance upright cannot be bent when weights are exchanged, so the magnitude capability of reappearance quality of the balance can be improved.

Description

technical field [0001] The invention belongs to the technical field of mass measurement, and in particular relates to a dish-type lever balance designed for accurately reproducing the mass of a weight, which can effectively prevent the balance column from bending and improve repeatability. Background technique [0002] In the process of mass value transfer, the weight is the main standard, and the weight is the subordinate balance physical measuring tool, and the balance is mainly used to reproduce the mass value of the weight. Therefore, the weighing performance of a balance is an important part of the mass transfer capability. With high-accuracy weights, a high-accuracy balance must be matched to build a high-accuracy weight standard device. [0003] According to the provisions of "JJG99-2006 Weight Verification Regulations", all mass transmissions adopt the substitution method. When a lever balance is used as the supporting equipment for mass transmission, one weighing p...

AI Technical Summary

Problems solved by technology

Analyzing the reason for the change of the balance display value, first suspect that the position of the weight on the weighing pan has changed, resulting in an eccentric load error. After deliberately amplifying the degree of eccentric load to verify, it is found that the eccentric load error is not the main reason

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